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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 216 |
| 2 | 49248 |
| 3 | 21609504 |
| 4 | 9000122112 |
| 5 | 4129083886032 |
| 6 | 1919370450227328 |
| 7 | 917374442680570176 |
| 8 | 444151666318727522304 |
| 9 | 217813424092164713883960 |
| 10 | 107771776495186976967396672 |
| 11 | 53736084111333058216805911392 |
| 12 | 26958647064591216695092188902400 |
[1,216,49248,21609504,9000122112,4129083886032, 1919370450227328,917374442680570176, 444151666318727522304,217813424092164713883960, 107771776495186976967396672, 53736084111333058216805911392, 26958647064591216695092188902400] |